Courtly Lover's Gunblade ★★★★

Taken all the way down to base materials, one Courtly Lover's Gunblade is 2 crafting steps deep and needs 4 intermediates — Double Duraluminum Ingot ×4, Grade 4 Gemsap of Vitality ×2, Rose Garnet ×1 and 1 other — which resolve to 9 distinct raw materials totalling 43 units, plus 50 crystals.

That bill outweighs 12,178 of the 13,602 recipes tracked here and 1,542 of the 1,932 Blacksmith ones, and 4,464 recipes nest deeper.

Only 6 of those crystals go into the final step; the other 44 are burned by the intermediates, so the real crystal cost is 18 Fire Cluster, 15 Earth Cluster, 8 Lightning Crystal and 3 other kinds.

The chain crosses four disciplines — Blacksmith to Lv 100, Alchemist to Lv 100, Goldsmith to Lv 100 and Weaver to Lv 98 — so no single class can finish it unaided.

6 of the 9 raw materials come out of the ground, and 3 of them are time-gated: Dense Aluminum Ore (10:00, 22:00), Rose Garnet Ore (0:00, 12:00) and 1 other. The widest gap between consecutive opening times is 8 Eorzean hours, about 23 real-world minutes.

Of the intermediates, Thunderyards Silk has the widest use: 120 recipes call for it, spanning seven of the eight crafting classes.